[OS X TeX] \boldsumlim disappeared

[Herbert Schulz]

> On Apr 1, 2015, at 8:11 AM, George Gratzer <gratzer at me.com> wrote:
> 
> Working on Math into LateX, fifth edition, all of a sudden I could not typeset. 
> \boldsumlim is an undefined control sequence.
> 
> I checked if the typing was corrupted. No. 
> So the definition was somehow corrupted. I reinstalled MacTeX. Did not help.
> 
> I’m out of ideas.
> 
> GG

Howdy,

Don't know why it didn't work but reinstalling MacTeX is virtually NEVER needed. Did you recently do an update using TeX Live Utility? It may be that a package was updated and introduced a new bug. Also, looking at the amsmath and mathtools documentation I don't see \boldsumlim defined. Where are you picking it up?

Good Luck,

Herb Schulz
(herbs at wideopenwest dot com)